Sensei, Ore ni Kamawazu Itte Kudasai!!

Ashida Mamoru is a god-tier manga assistant but his habit of turning authors lazy has left him without a job. Luckily one of his classmates from university happens to have a little sister who is a serialised manga author in need of an assistant.

(Source: MangaDex)

Included one-shots:
Volume 2: Code:0G